Updated kernel-rt packages that fix multiple security issues and various
bugs are now available for Red Hat Enterprise MRG 1.3.

The Red Hat Security Response Team has rated this update as having
important security impact. Common Vulnerability Scoring System (CVSS) base
scores, which give detailed severity ratings, are available for each
vulnerability from the CVE links in the References section.

2. Relevant releases/architectures:

MRG Realtime for RHEL 5 Server - i386, noarch, x86_64

3. Description:

The kernel-rt packages contain the Linux kernel, the core of any Linux
operating system.

This update fixes the following security issues:

* A race condition in the way the Linux kernel's InfiniBand implementation
set up new connections could allow a remote user to cause a denial of
service. (CVE-2011-0695, Important)

* An integer signedness flaw in drm_modeset_ctl() could allow a local,
unprivileged user to cause a denial of service or escalate their
privileges. (CVE-2011-1013, Important)

* A flaw in dccp_rcv_state_process() could allow a remote attacker to cause
a denial of service, even when the socket was already closed.
(CVE-2011-1093, Important)

* A missing validation of a null-terminated string data structure element
in bnep_sock_ioctl() could allow a local user to cause an information leak
or a denial of service. (CVE-2011-1079, Moderate)

* A flaw in the Linux kernel's Event Poll (epoll) implementation could
allow a local, unprivileged user to cause a denial of service.
(CVE-2011-1082, Moderate)

* A missing initialization flaw in the XFS file system implementation could
lead to an information leak. (CVE-2011-0711, Low)

* The start_code and end_code values in "/proc/[pid]/stat" were not
protected. In certain scenarios, this flaw could be used to defeat Address
Space Layout Randomization (ASLR). (CVE-2011-0726, Low)

* A missing validation check in the Linux kernel's mac_partition()
implementation, used for supporting file systems created on Mac OS
operating systems, could allow a local attacker to cause a denial of
service by mounting a disk that contains specially-crafted partitions.
(CVE-2011-1010, Low)

* A flaw in dev_load() could allow a local user who has the CAP_NET_ADMIN
capability to load arbitrary modules from "/lib/modules/", instead of only
netdev modules. (CVE-2011-1019, Low)

* A missing initialization flaw in sco_sock_getsockopt_old() could allow a
local, unprivileged user to cause an information leak. (CVE-2011-1078, Low)

* A buffer overflow flaw in the DEC Alpha OSF partition implementation in
the Linux kernel could allow a local attacker to cause an information leak
by mounting a disk that contains specially-crafted partition tables.
(CVE-2011-1163, Low)

* Missing validations of null-terminated string data structure elements
in the do_replace(), compat_do_replace(), do_ipt_get_ctl(),
do_ip6t_get_ctl(), and do_arpt_get_ctl() functions could allow a local user
who has the CAP_NET_ADMIN capability to cause an information leak.
(CVE-2011-1170, CVE-2011-1171, CVE-2011-1172, CVE-2011-1080, Low)

This update also fixes various bugs. Documentation for these bug fixes will
be available shortly from the Technical Notes document linked to in the
References section.

Users should upgrade to these updated packages, which upgrade the kernel-rt
kernel to version 2.6.33.9-rt31, and correct these issues. The system must
be rebooted for this update to take effect.

4. Solution:

Before applying this update, make sure all previously-released errata
relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to
use the Red Hat Network to apply this update are available at
https://access.redhat.com/kb/docs/DOC-11259

To install kernel packages manually, use "rpm -ivh [package]". Do not
use "rpm -Uvh" as that will remove the running kernel binaries from
your system. You may use "rpm -e" to remove old kernels after
determining that the new kernel functions properly on your system.